Device for compressing spring valves



July 21, 1959 cs. H. KILLEEN, JR 2,895,213

DEVICE FOR COMPRESSING SPRING VALVES Filed Dec. 1, 1955 s Sheets-Sheet 1 /Z 45'' z /0 /Z INVENTOR fl/SATTORNEY July 21, 1959 s. H. KILLEVEN, JR 2,895,213

DEVICE FOR COMPRESSING SPRING VALVES.

Fi led Dec. .1, 1955 3 Sheets-Sheet 3 INVENTOR ago/P0; H K/LL EA'M m By. W

67.5 ATTORNEY United States Patent Ofifice 2,895,213 Patented July 21, 1959 DEVICE FOR COMPRESSING SPRING VALVES George H. Killeen, Jr., Hyde Park, Mass.

Application December 1, 1955, Serial No. 550,314

'2 Claims. (Cl. 29-213) This invention relates to a device for compressing Spring valves, and has for one of its objects the production of a simple and efficient means for compressing a valve spring to facilitate the removal of the valve locks or keys.

A further object of this invention is the production of a means for compressing a valve spring from a foot control pedal.

Other objects and advantages of the present invention will appear throughout the following specification and claims.

In the drawings:

Figure l is a perspective View of the invention;

Figure 2 is a top plan view of the air brake chamber supporting frame or stand;

Figure 3 is a side elevational view;

Figure 4 is an end elevational view;

Figure 5 is an enlarged vertical sectional view showing the valve spring retainer engaging a valve spring;

Figure 6 is a perspective view of the foot pedal, air control valve and air brake chamber assembly;

Figure 7 is a top plan view of a modified type of the spring engaging attachment;

Figure 8 is a sectional view taken on line 88 of Figure 7;

Figure 9 is a transverse sectional view taken on line 99 of Figure 8;

Figure 10 is a side elevational view, partly in section of the air chamber or air brake chamber.

By referring to the drawings in detail, it will be seen that 10 designates a work bench or table upon which an air brake chamber supporting frame or stand 11 is mounted. The frame 11 preferably is rectangular and comprises the supporting legs 12 which rest upon base plates 13. These base plates 13 in turn rest upon the top face of the work bench or table 10 to provide stability. Angle iron track rails 14 defining a trackway are supported by transverse angle braces 15a at the ends of the frame 11, and these track rails 14 extend longitudinally of the frame 11 in longitudinal spaced relation, as shown in Figures 2 and 4. Longitudinally extending top side angle rails 14 connect the pairs of end legs at the respective ends of the frame 11, and transverse plates 16 brace the legs at the ends of the frame 11, as shown.

An air brake chamber 17 of a conventional type having a flat base 18 which base slidably rests upon the track rails 14, is shown in Figure 4. The chamber 17 is adjustable longitudinally of the frame 11, so that the chamber 17 may be moved to a selected position to accommodate the work. The chamber 17 is provided with a suitable piston 19 which carries a depending stem 20 to the lower end of which is connected a spring engaging attachment 21 by being threaded thereon, or otherwise connected thereto. The attachment 21 is preferably substantially cone-shaped and is provided with a side opening 22 to facilitate access to the interior of the attachment to remove valve lock-s or keys 23 from the valve stem when tension on the valve spring is released. The attachment 21 is of a suitable shape to receive the upper end of the valve 24 and valve spring retainer of the spring 25 of the conventional type, as shown in Figure 5.

As is shown in Figures 1 and 6, an air hose 26 is connected to the air brake chamber 17, and the opposite end of the air hose is in turn connected to an air control valve 27 of the conventional type, the valve 27 being connected to a compressed air intake pipe 28. The intake pipe 28 is provided with a control valve 29 to permit the air supply to be cut off when not in use. A foot pedal 30 of the conventional type opens and closes the air control valve 27 to control the passage of air through the air hose 26. The air control valve 27 is preferably hung by a bracket 31 from a longitudinal rail 32 of the work bench or table 10, as is shown in Figure 1. A spring guide 33 is carried at one end of the frame 11, through which guide the air hose 26 extends, leading to the chamber 17. This spring guide 33 extends outwardly beyond one end of said frame 11, and is inclined slightly upwardly as is shown in Figures 2, 3 and 4. The spring guide 33 is provided with an air hose receiving eye at its outer end outwardly of said frame and spreading legs connected to the end of said frame to yieldably support and permit the air hose 26 to freely slide therethrough at a point outwardly and above the frame 11, as the hose 26 passes upwardly from the air control valve 27, which valve is located under the support, such as the work bench or table 10. In this way the air hose 26 will at all times be held upwardly and out of entanglement with the track rails 14, as the air brake chamber 17 slides longitudinally back and forth on the track rails 14. The air brake chamber 17 may therefore be moved longitudinally on the track rails 14 without fear of breaking the air hose 26 or pinching the air hose between the bottom of the air brake chamber 17 and the track rails 14.

In carrying out the invention, the work such as the cylinder head of any overhead valved engine is placed upon the bench or table 10, and the chamber 17 is positioned upon the rails 14 so that the attachment 21 overhangs the spring and valve where the spring is to be removed. The attachment is then moved into an overhanging position with respect to the valve and spring, as shown in Figure 5. The pedal 30 is operated to open the control valve 27 and thereby cause compressed air to pass through the air hose 26 to operate the stem 20 of the air brake chamber 17 through the piston 19. The attachment 21 will then be forced downwardly thereby compressing the spring 25, and when tension is relieved from the spring 25, the operator may reach through the opening 22 and easily remove the locks or keys 23. The valve may then be removed for grinding, or may be replaced if desired, or other repairs or adjustments may be made which may be found necessary. By noting the pressure required to compress the spring, the operator may check the tension of the spring or determine the extent of depression.

In Figures 7 and 8, there is shown a modified form of attachment which may replace the attachment 21 if desired. In this attachment, a stem similar to the stem 20 is threaded into the threaded aperture 34 of the collar 35 which is carried by the bridge 36. The bridge 36 carries a pair of depending arms such as the arm 37 shown in Figure 8, and the lower ends of the arms carry a horizontal ring 38 which is provided with a work engaging shoulder 39 to facilitate spring compression. The area between the arms is open to facilitate access to the locks or keys of a valve stem after spring compression.

It should be understood that certain detail changes in the construction and arrangement of parts may be employed without departing from the spirit of the invention, so long as such changes fall within the scope of the appended claims.

' Having described the invention, what I claim as new is: 1. An apparatus of the class described comprising a support, a frame mounted upon said support, longitudinal track rail-s carried by said frame, an air brake chamber mounted for longitudinal sliding movement upon said track rails, a spring engaging attachment actuated from said air brake chamber, an air control valve carried by said support below said frame, a spring guide carried at one end of said frame and projecting beyond the end of said frame and being inclined slightly upwardly, said spring guide having an air hose receiving eye, and an air hose extending from said air control valve below said frame and extending through said air hose receiving eye and connected to said air brake chamber carried by said frame, said spring guide holding said hose above said air brake chamber and out of entanglement with said air brake chamber and track rails to avoid pinching of said hose between the bottom of said air brake chamher and said track rails as said air chamber is moved longitudinally of said track rails.

2. An apparatus as defined in claim 1, wherein said spring guide comprises spreading legs connected to said frame to yieldably support said hose receiving eye outwardly of and away from the end of said frame.

References Cited in the file of this patent UNITED STATES PATENTS 2,056,329 Prosser Oct. 6, 1936 2,524,949 Applegate Oct. 10, 1950 2,691,209 Stearns Oct. 12, 1954 

